Cartesian vs SCARA vs Articulated Robots: Key Differences Explained
Industrial robots are a crucial component of modern manufacturing. Different types of robots do different tasks. The robots most commonly used in industrial settings include Cartesian, SCARA, and articulated robots. The robot you choose for an assembly line, packaging plant, or other industrial function can affect the plant's effectiveness and productivity. Each robot type has advantages and disadvantages. If you're a robotics technician working on robots in an industrial setting, you may need to have a deep understanding of each type of robot, including its strengths and limitations.
Key Takeaways
Cartesian robots move along X, Y, and Z axes, requiring a large workspace for conducting precise, repetitive tasks.
SCARA robots perform repetitive movements in a small workspace, provided the payload is low.
Articulated robots perform complex movements in a three-dimensional space and may be used for complex industrial applications.
Space requirements, reach, payload, and flexibility are all considerations when choosing the best robot for the job.
Robotics technicians must develop expertise in a variety of robot types to do their job.
What Is a Cartesian Robot?
A Cartesian robot moves along three primary axes: X, Y, and Z. This type of robot has precise, predictable, repeatable linear movements. It's not very flexible, and it doesn't move around obstacles well. It's generally used in electronics manufacturing, laboratories, and material handling tasks.
What Is a SCARA Robot?
SCARA stands for Selective Compliance Assembly Robot Arm. SCARA robots have two parallel arms that move in a single plane. They move quickly while maintaining precision, so they're a good option for repetitive movements. They have limited payload, which makes them a poor choice for some applications. SCARA robots are a good choice for tasks like screwdriving and light assembly.
What Is an Articulated Robot?
An articulated robot is a robotic arm that contains multiple rotary joints. These robots are highly flexible and often used in versatile applications because they can reach around obstacles to complete a range of complex automation tasks. They require greater programming expertise than other robots, so the technician working on the robot must have solid training to make this robot do its job. Articulated robots can weld, paint, handle materials, assemble products, and more and are widely used in industrial applications.
Comparing Movement and Reach
Cartesian robots move on their axes in straight lines, while SCARA robots use rotary joints to make fast movements in a relatively small workspace. Articulated robots have the most complex movement of all three robot types because their rotary joints make complex three-dimensional movements. When it comes to robot movements, greater reach and flexibility are associated with increased mechanical complexity and higher maintenance needs.
Comparing Speed and Precision
Cartesian and SCARA robots are both effective when it comes to making fast, repetitive movements, but articulated robots can also achieve high precision and speed while providing greater flexibility. Speed and precision matter in industrial settings where moving quickly means increased productivity.
Comparing Payload Capacity
The payload is how much weight a robot is designed to carry. SCARA robots have a relatively low payload, while Cartesian and articulated robots tend to have a higher payload. Generally, the payload must be considered with other factors like reach and precision to achieve the desired outcome.
Comparing Workspace Requirements
Cartesian robots can require significant linear and overhead structures, while SCARA robots require minimal amounts of space. Articulated robots have a large, complex three-dimensional operating space. In small facilities, they may not be the best choice.
Strengths and Limitations at a Glance
If you're a robotics technician deciding between one robot option and another, here are some of the strengths and limitations to consider as you make a recommendation.
Cartesian robots make linear movements with precision, but are less capable of performing complex tasks. They're a solid choice for tasks that follow predictable linear paths with high repeatability. Cartesian robots may need a large work area to do the job.
SCARA robots are best for fast and precise repetitive assembly but have a limited range of motion. They're relatively small and are a good option when the workspace is compact.
Articulated robots are flexible and capable of performing complex movements. An articulated robot is the best choice when there are multiple axes of movement, or the robot needs to be able to reach around objects.
Keep in mind that complexity of movement is not always a requirement, and sometimes the simplest option is the best. As you develop your skills and gain experience with these different types of robots, you'll get better at identifying which robot is best for which application.
How to Choose the Right Robot
Technicians trying to choose the best robot for the job can start by asking themselves a series of questions. How far must the robot reach? What's the payload? How much workspace is available? Finding the right balance between performance, cost, and ease of integration is important.
Get Your Start as a Robotics Technician
Robot architecture affects how it moves and where it can work. Choosing the right robot for the task is important. You'll learn about the fundamental differences between Cartesian, SCARA, and articulated robots through your online Robotics Technician Training.
If robotics interests you and you'd like to get started as a Robotics Technician, begin by enrolling in a program that teaches you about the latest robotics technologies. To enter this exciting field, contact us at 1-888-553-5333 to speak to one of our Program Consultants and to learn about our Robotics Technician Training Program today.